1---
2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
3SPDX-License-Identifier: curl
4Title: CURLINFO_CONTENT_LENGTH_DOWNLOAD_T
5Section: 3
6Source: libcurl
7See-also:
8  - CURLINFO_CONTENT_LENGTH_UPLOAD_T (3)
9  - curl_easy_getinfo (3)
10  - curl_easy_setopt (3)
11Protocol:
12  - HTTP
13---
14
15# NAME
16
17CURLINFO_CONTENT_LENGTH_DOWNLOAD_T - get content-length of download
18
19# SYNOPSIS
20
21~~~c
22#include <curl/curl.h>
23
24CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T,
25                           curl_off_t *content_length);
26~~~
27
28# DESCRIPTION
29
30Pass a pointer to a *curl_off_t* to receive the content-length of the
31download. This is the value read from the Content-Length: field. Stores -1 if
32the size is not known.
33
34# EXAMPLE
35
36~~~c
37int main(void)
38{
39  CURL *curl = curl_easy_init();
40  if(curl) {
41    CURLcode res;
42    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
43
44    /* Perform the request */
45    res = curl_easy_perform(curl);
46
47    if(!res) {
48      /* check the size */
49      curl_off_t cl;
50      res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &cl);
51      if(!res) {
52        printf("Download size: %" CURL_FORMAT_CURL_OFF_T "\n", cl);
53      }
54    }
55  }
56}
57~~~
58
59# AVAILABILITY
60
61Added in 7.55.0
62
63# RETURN VALUE
64
65Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
66